Related Experiment Video
Updated: May 23, 2026
09:47
Interfacing 3D Engineered Neuronal Cultures to Micro-Electrode Arrays: An Innovative In Vitro Experimental Model
Published on: October 18, 2015
Shaping bursting by electrical coupling and noise.
Georgi S Medvedev1, Svitlana Zhuravytska
1Department of Mathematics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA. medvedev@drexel.edu
Biological Cybernetics
|March 28, 2012
Summary
Electrical coupling in cell networks can synchronize activity and reduce noise, leading to synchronized bursting. Network topology, like high algebraic connectivity, enhances this denoising effect.
Area of Science:
- Computational neuroscience
- Systems biology
- Mathematical biology
Background:
- Electrical coupling synchronizes activity in neuronal and cellular networks.
- Electrically coupled networks can exhibit synchronized oscillations different from uncoupled cells, notably synchronized bursting in pancreatic beta-cells.
- Noise can significantly impact cellular activity, and electrical coupling may mitigate these effects through a process called denoising.
Purpose of the Study:
- To derive quantitative estimates for denoising in electrically coupled networks of conductance-based square wave bursting cells.
- To analyze the interplay between intrinsic cell properties, network topology, and denoising.
- To understand the role of network topology in synchronization and stability.
Main Methods:
- Analysis of denoising in networks of integrate-and-fire neurons.
- Study of spontaneous activity in Locus Coeruleus networks.
- Derivation of quantitative estimates for denoising in conductance-based models.
- Analytical estimation of convergence rates to the synchronization subspace and its stability.
- Numerical simulations of electrically coupled conductance-based networks.
Main Results:
- Electrical coupling enables synchronized bursting in networks of cells that are irregularly spiking in isolation.
- Networks with high algebraic connectivity or low total effective resistance are more effective at denoising.
- Network topology plays a crucial role in synchronization speed and stability of the synchronized state.
- Analytical estimates of synchronization subspace convergence and stability were obtained.
Conclusions:
- Electrically coupled networks exhibit a denoising phenomenon that synchronizes cell activity and reduces noise effects.
- Network topology is a key determinant of denoising efficiency and synchronization properties.
- The findings explain the mechanisms of synchronization and denoising in biological models like pancreatic islets.
Related Concept Videos
01:19Role of Shaping in Operant Conditioning
Shaping is a technique used in operant conditioning to train complex behaviors by rewarding successive approximations toward the target behavior. This method is necessary because organisms are unlikely to perform complex behaviors spontaneously. Instead, shaping breaks down the desired behavior into small, manageable steps.
The steps involved in shaping begin with reinforcing any response that resembles the desired behavior. For example, parents might praise a child for picking up one toy. As...
The steps involved in shaping begin with reinforcing any response that resembles the desired behavior. For example, parents might praise a child for picking up one toy. As...
01:22Muscle Stimulation Frequency
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
01:12Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
01:25Neural Circuits
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
01:23Insulation Coordination
Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times for...
01:20Design Example: Capacitance Multiplier Circuit
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.